Synchronizing circuit in a spread spectrum communications system
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United States of America Patent
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Dec 20, 1994
Grant Date -
N/A
app pub date -
Jun 17, 1993
filing date -
Jun 17, 1992
priority date (Note) -
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Abstract
By taking the product of two correlators, the present invention realizes a synchronizing method having good tracking characteristics and not requiring balance between pairs of correlator signals in a receive system for a spread spectrum communications system for a carrier band. A correlator 1 correlates the received signals and the PN signals from a PN signal generator 6 and a correlator 2 correlates the received signals, PN signals from a PN signal generator 6, and clock signals from a VCC 5. The signals of the correlator 1 and the signals of the correlator 2 are multiplied by a multiplier 3, and are passed through a low pass filter 4 so as to obtain and control signals for clock control of PN signals.
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